1. A flexible parameterization of GPDs, their role in DVCS, neutral meson leptoproduction.
- Author
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Goldstein, Gary R., Liuti, Simonetta, and Hernandez, J. Osvaldo Gonzalez
- Subjects
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ANGULAR distribution (Nuclear physics) , *PARTONS , *CHIRALITY of nuclear particles , *MESONS , *PAIR production , *INELASTIC scattering , *HELICITY of nuclear particles - Abstract
A physically motivated parameterization of the chiral-even generalized parton distributions (GPDs) has been obtained from a global analysis using available experimental data including nucleon electromagnetic form factors, deep inelastic scattering and DVCS. Additional information provided by lattice calculations of the higher moments of GPDs is also considered. Recently extracted observables from DVCS at JLab and Hermes are reproduced by our fit and predictions are made for higher energy regimes. Our scheme uses a Reggeized diquark model and concomitant helicity amplitude relations, which allow the extension to the chiral-odd sector. Having obtained the chiral-odd GPDs, we are able to explain the features of exclusive neutral meson electroproduction. Our analysis is applied to existing and forthcoming spin-dependent π0 and η data in the kinematical region of intermediate Bjorken x and Q2 in the multi-GeV region, accessible at present and currently planned facilities. [ABSTRACT FROM AUTHOR]
- Published
- 2012
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